CN104767196A - Automatic in service and out of service method for restarting monitoring function of direct current transmission line fault - Google Patents
Automatic in service and out of service method for restarting monitoring function of direct current transmission line fault Download PDFInfo
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- CN104767196A CN104767196A CN201510155153.8A CN201510155153A CN104767196A CN 104767196 A CN104767196 A CN 104767196A CN 201510155153 A CN201510155153 A CN 201510155153A CN 104767196 A CN104767196 A CN 104767196A
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- direct current
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- automatic switching
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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Abstract
The invention discloses an automatic in service and out of service method for restarting a monitoring function of a direct current transmission line fault. The method comprises the steps that 1, a direct current system running mode judging device module is adopted to judge a direct current system is in a networking mode or in an isolated mode; 2, the direct current system is judged to be in the networking mode in the step one, and whether an operator allows the fault to restart the monitoring function to achieve in service and out of service automatically or not is judged through a line fault monitoring function restarting and automatic in service and out of service function judging device module; 3, the operator is judged to allow the fault to restart the monitoring function to achieve in service and out of service automatically in the step two, and bipolar direct current actual transmission power is calculated by adopting a bipolar direct current power calculator module; size comparison between the bipolar direct current actual transmission power and a threshold value is conducted through a power threshold value comparator module; when the bipolar direct current actual transmission power is larger than the threshold value, automatic in service of the monitoring function restarting is conducted; when the bipolar direct current actual transmission power is smaller than the threshold value, automatic out of service of the monitoring function restarting is conducted. The automatic in service and out of service method for restarting the monitoring function of the direct current transmission line fault has the advantages that the operation efficiency of the operator is improved, and the impact of the direct current line fault on safe and stable running of a power system is reduced more effectively.
Description
Technical field
The present invention relates to a kind of direct current transmission line fault and restart function for monitoring automatic switching method.
Background technology
Perform restarting process in DC engineering after DC line fault and can produce impact to alternating current-direct current electrical network, for jumbo bipolar DC engineering, during oepration at full load, DC line fault is restarted period or is restarted electrical network unsuccessfully and can lose the through-put power of fault pole, certain hour is needed to enter stable state after the power that grid loss is larger, if a pole is still in restarting process or after restarting unsuccessfully locking stoppage in transit, restart unsuccessfully after another pole line fault, stabilized control system will be extended and cut machine operate time, increase the risk of system unstability.When Smaller load runs, because bipolar through-put power is less, even if the two poles of the earth perform line fault in succession restart the stable operation that failure also can not have influence on electrical network.In order to avoid the unordered execution line fault of DC bipolar restarts the system unstability caused, all configure line fault in DC engineering and restart function for monitoring, control bipolar execution line fault restart strategy, as forbidden that another pole line fault is restarted in the T time after next the pole locking of DC online pattern or emergency trip.
Because direct current transmission power under island mode is large in existing DC engineering, line fault is restarted function for monitoring and is automatically dropped into; And under DC online pattern, line fault restarts the manual input that function for monitoring depends on operations staff, and be not that the power level considered according to Functional Design principle completely drops into and exits, be unfavorable for the safe and stable operation of electrical network, particularly under automated power curve, possible every day be not in different power levels in the same time, operations staff repeatedly can not throw in time, reliably and move back this function.
Therefore prior art haves much room for improvement and develops.
Summary of the invention
The technical problem to be solved in the present invention is to provide under one can realize different capacity level restarts function for monitoring automatic switching to line fault, ensures that the direct current transmission line fault of the safety and stability of electrical network restarts function for monitoring automatic switching method.
Technical solution of the present invention is: a kind of direct current transmission line fault restarts function for monitoring automatic switching method, comprises the following steps:
S1: adopt direct current system operational mode determining device module to judge that direct current system is in networked mode or island mode;
Judge in S2:S1 that direct current system is in networked mode, restart function for monitoring automatic switching function determining device module by line fault and judge whether operations staff allows fault to restart function for monitoring and realize automatic switching;
Judge in S3:S2 that operations staff allows fault to restart function for monitoring and realizes automatic switching, adopt bipolar DC power calculator module to calculate the power of bipolar DC actual transmissions; The power of bipolar DC actual transmissions and the size of threshold value is compared by power door threshold value comparator module; The power of bipolar DC actual transmissions is greater than threshold value and then automatically drops into and restart function for monitoring; The power of bipolar DC actual transmissions is less than threshold value then automatically to be exited and restarts function for monitoring.
Judge in S1 that direct current system is in island mode, then automatic switching enters line fault and restarts function for monitoring.
Judge in S2 that operations staff does not allow fault to restart function for monitoring and realizes automatic switching, operations staff then manually drops into line fault restarts function for monitoring.
Direct current system operational mode judge module, its major function is as follows:
1) receive the DC operation pattern that pole control system is sent in the control of direct current station, judge that direct current system is in networked mode or island mode;
2) direct current system is in island mode, and automatic switching enters line fault and restarts function for monitoring;
3) direct current system is in networked mode, then enter the decision logic of next link.
Line fault restarts function for monitoring automatic switching function determining device module, and its major function is as follows:
1) first decision logic is the enable condition that direct current system is in as determining device module under networked mode, and under networked mode, input state amount 1 is in judge module; Under non-networked pattern, input state amount 0 is in judge module; Determining device module according to the numerical value of input state amount, whether judge module has an effect, and when input state numerical quantity is 1, then judge module activates, and enters second decision logic;
2), after entering second decision logic, receive the order that operations staff issues, if operations staff does not allow fault to restart function for monitoring automatic switching, then the input variable in determining device module is 0; If operations staff allows fault to restart function for monitoring automatic switching, then the input variable in determining device module is 1.The order input variable that determining device reception operations staff issues is 0, then do not enter the 3rd decision logic, fault is restarted function for monitoring and manually can only be dropped into by operations staff; The order input variable that determining device reception operations staff issues is 1, then enter the 3rd decision logic.
Bipolar DC power calculator module, for calculating the power of bipolar DC actual transmissions; Specific algorithm is as follows:
P＝ABS(U
1*I
1)+ABS(U
2*I
2)；
P is the power of bipolar DC actual transmissions, U
1for pole 1 direct voltage, I
1for pole 1 direct current, U
2for pole 2 direct voltage, I
2for pole 2 direct current, ABS () representative takes absolute value.
Power door threshold value comparator module, for comparing power P and the threshold value P of bipolar DC actual transmissions
doorsize; Its concrete steps are as follows:
1) when operations staff allows fault to restart function for monitoring automatic switching, comparator module just can be had an effect;
2) P>=P
door, the power of bipolar DC actual transmissions is more than or equal to threshold value and then automatically drops into and restart function for monitoring;
3) P<P
door, the power of bipolar DC actual transmissions is less than threshold value then automatically to be exited and restarts function for monitoring.
Beneficial effect of the present invention: under different capacity level can be realized, function for monitoring automatic switching is restarted to line fault, ensure the safety and stability of electrical network, improve the operating efficiency of operations staff, more effective reduction DC line fault is to the impact of power network safety operation.
Accompanying drawing explanation
Fig. 1 is automatic switching Method And Principle figure of the present invention
Embodiment
Embodiment:
A kind of direct current transmission line fault restarts function for monitoring automatic switching method, comprises the following steps:
S1: adopt direct current system operational mode determining device module to judge that direct current system is in networked mode or island mode, direct current system is in island mode if judge, then automatic switching enters line fault and restarts function for monitoring.
S2: first decision logic of automatic switching function determining device module is judge that direct current system is in networked mode in S1, then the input variable of automatic switching function determining device module is 1, determining device module activation, enters second decision logic.Receive the order that operations staff issues, if allow fault to restart the order of function for monitoring automatic switching, then bid value is input as 1, then enter S3 step; If do not allow fault to restart the order of function for monitoring automatic switching, then bid value is input as 0, does not enter S3 step.
Judge in S3:S2 that operations staff allows fault to restart function for monitoring and realizes automatic switching, adopt bipolar DC power calculator module to calculate the power of bipolar DC actual transmissions; The power of bipolar DC actual transmissions and the size of threshold value is compared by power door threshold value comparator module; The power of bipolar DC actual transmissions is greater than threshold value and then automatically drops into and restart function for monitoring; The power of bipolar DC actual transmissions is less than threshold value then automatically to be exited and restarts function for monitoring.S2 judges that operations staff does not allow fault to restart function for monitoring and realizes automatic switching, and operations staff then manually drops into line fault restarts function for monitoring.
The method specific works flow process is as follows:
A kind of direct current transmission line fault is restarted function for monitoring automatic switching method and is analyzed following three kinds of situations:
(1) direct current system operational mode determining device module judges system running pattern, and under direct current is in island mode, then automatic switching enters line fault and restarts function for monitoring.
(2) direct current system operational mode determining device module judges system running pattern, under direct current is in networked mode, after operations staff allows input direct current transmission line fault to restart function for monitoring automatic switching function, the method judges whether direct current transmission power is greater than threshold value P (P value chooses watt level empirical value corresponding when operations staff manually drops into this function), if be greater than threshold value, then automatically drop into function for monitoring, if be less than threshold value, then automatically exit function for monitoring.In the change procedure of direct current power, more high efficiency throwing can move back and restart function for monitoring.
(3) direct current system operational mode determining device module judges system running pattern, under direct current is in networked mode, operations staff does not allow to drop into direct current transmission line fault and restarts function for monitoring automatic switching function, then the input of restarting function for monitoring exits and still depends on operations staff and manually drop into, exit.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of the claims of this case.
Claims (4)
1. direct current transmission line fault restarts a function for monitoring automatic switching method, it is characterized in that: comprise the following steps:
S1: adopt direct current system operational mode determining device module to judge that direct current system is in networked mode or island mode;
Judge in S2:S1 that direct current system is in networked mode, restart function for monitoring automatic switching function determining device module by line fault and judge whether operations staff allows fault to restart function for monitoring and realize automatic switching;
Judge in S3:S2 that operations staff allows fault to restart function for monitoring and realizes automatic switching, adopt bipolar DC power calculator module to calculate the power of bipolar DC actual transmissions; The power of bipolar DC actual transmissions and the size of threshold value is compared by power door threshold value comparator module; The power of bipolar DC actual transmissions is greater than threshold value and then automatically drops into and restart function for monitoring; The power of bipolar DC actual transmissions is less than threshold value then automatically to be exited and restarts function for monitoring.
2. direct current transmission line fault according to claim 1 restarts function for monitoring automatic switching method, it is characterized in that: judge in S1 that direct current system is in island mode, then automatic switching enters line fault and restarts function for monitoring.
3. direct current transmission line fault according to claim 1 restarts function for monitoring automatic switching method, it is characterized in that: S2 judges that operations staff does not allow fault to restart function for monitoring and realizes automatic switching, operations staff then manually drops into line fault restarts function for monitoring.
4. direct current transmission line fault according to claim 1 restarts function for monitoring automatic switching method, it is characterized in that: first decision logic that described line fault restarts function for monitoring automatic switching function determining device module is judge that direct current system is in networked mode in S1, then the input variable of automatic switching function determining device module is 1, determining device module activation, enter second decision logic, receive the order that operations staff issues, if allow fault to restart the order of function for monitoring automatic switching, then bid value is input as 1, then enter S3 step; If do not allow fault to restart the order of function for monitoring automatic switching, then bid value is input as 0, does not enter S3 step.
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| CN201510155153.8A CN104767196B (en) | 2015-04-02 | 2015-04-02 | Automatic in service and out of service method for restarting monitoring function of direct current transmission line fault |
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Cited By (5)
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| CN105425103A (en) * | 2015-11-05 | 2016-03-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | EHV (extra-high voltage) DC power transmission bipolar line fault restart coordination improving method and system |
| CN105606917A (en) * | 2015-10-30 | 2016-05-25 | 南方电网科学研究院有限责任公司 | In-loop inter-tripping related function test method and system of one-tower two-loop DC engineering |
| CN107086560A (en) * | 2017-06-23 | 2017-08-22 | 南方电网科学研究院有限责任公司 | The method of locking direct current, system and direct current station control cabinet under a kind of isolated island low-power |
| CN111193238A (en) * | 2020-01-14 | 2020-05-22 | 中国南方电网有限责任公司 | Direct-current line fault restarting method and device for multi-terminal high-voltage direct-current power transmission system |
| CN113824096A (en) * | 2021-09-18 | 2021-12-21 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method, device and equipment for resetting direct-current transmission line protection system and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606917A (en) * | 2015-10-30 | 2016-05-25 | 南方电网科学研究院有限责任公司 | In-loop inter-tripping related function test method and system of one-tower two-loop DC engineering |
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| CN105425103B (en) * | 2015-11-05 | 2018-05-18 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of extra-high voltage direct-current transmission bipolar line failure restarts coordination function improved method and system |
| CN107086560A (en) * | 2017-06-23 | 2017-08-22 | 南方电网科学研究院有限责任公司 | The method of locking direct current, system and direct current station control cabinet under a kind of isolated island low-power |
| CN107086560B (en) * | 2017-06-23 | 2023-05-16 | 南方电网科学研究院有限责任公司 | Method and system for locking direct current under island low power and direct current station control cabinet |
| CN111193238A (en) * | 2020-01-14 | 2020-05-22 | 中国南方电网有限责任公司 | Direct-current line fault restarting method and device for multi-terminal high-voltage direct-current power transmission system |
| CN111193238B (en) * | 2020-01-14 | 2021-12-14 | 中国南方电网有限责任公司 | Direct-current line fault restarting method and device for multi-terminal high-voltage direct-current power transmission system |
| CN113824096A (en) * | 2021-09-18 | 2021-12-21 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method, device and equipment for resetting direct-current transmission line protection system and storage medium |
| CN113824096B (en) * | 2021-09-18 | 2024-04-02 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method, device, equipment and storage medium for resetting direct current transmission line protection system |
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